Event Title
Extraction of Pesticides from Contaminated Soil via Cyclodextrin Complexation
Presentation Type
Poster/Portfolio
Presenter Major(s)
Chemistry
Mentor Information
Andrew Lantz, lantza@gvsu.edu
Department
Chemistry
Location
Henry Hall Atrium 29
Start Date
13-4-2011 9:00 AM
End Date
13-4-2011 10:00 AM
Keywords
Environment, Physical Science
Abstract
Cyclodextrins (CDs) were successfully used to extract commonly used pesticides from contaminated soil via CD complexation, a more environmentally friendly method compared to surfactants and organic solvents. A combination of five CDs (alpha-CD, beta-CD, gamma-CD, hydroxypropyl-beta-CD, and Methyl-beta-CD) and eight pesticides 2,4-D, alachlor, acetochlor, diazinon, dicamba, dimethanamid, metalochlor and propanil) were examined in this study. It was found that a linear relationship exists between the concentrations of the M-beta-CD and alachlor, which generally indicates that the amount of pesticide extracted depends on the concentration of the cyclodextrin present. With some pesticide-cyclodextrin combination, it was found that as the concentration of cyclodextrin increases the CD-pesticide inclusion complex precipitated out of solution, thus reducing the solubility of the pesticide. Overall the most effective extractants based on this study were found to be HP-beta-CD and M-beta-CD.
Extraction of Pesticides from Contaminated Soil via Cyclodextrin Complexation
Henry Hall Atrium 29
Cyclodextrins (CDs) were successfully used to extract commonly used pesticides from contaminated soil via CD complexation, a more environmentally friendly method compared to surfactants and organic solvents. A combination of five CDs (alpha-CD, beta-CD, gamma-CD, hydroxypropyl-beta-CD, and Methyl-beta-CD) and eight pesticides 2,4-D, alachlor, acetochlor, diazinon, dicamba, dimethanamid, metalochlor and propanil) were examined in this study. It was found that a linear relationship exists between the concentrations of the M-beta-CD and alachlor, which generally indicates that the amount of pesticide extracted depends on the concentration of the cyclodextrin present. With some pesticide-cyclodextrin combination, it was found that as the concentration of cyclodextrin increases the CD-pesticide inclusion complex precipitated out of solution, thus reducing the solubility of the pesticide. Overall the most effective extractants based on this study were found to be HP-beta-CD and M-beta-CD.